What occurs when atoms link together in new ways to create a substance diffrent from the original substance?

A. a physical change

B. a chemical change

C. a nuclear reaction

D. an inversion

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Which element is presented in all organic compounds

Similarities between Noble Gases and Alkali Metals?

In the compound cah2 calcium has an oxidation number of 2 + and hydrogen has an oxidation number of

What was the half-life of a new isotope?

What happens to a reactant molecules when forming product molecules

Which is the atomic number of an atom with six valence electrons

O2 + CS2 → CO2 + SO2 Which of the following shows the equation balanced?

Convert 970. mm Hg to atm.

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy.